verify_checkpoint · Vigentic MCP: Risk & Policy

WHAT IT DOES

What verify_checkpoint does on Vigentic MCP

AI agents invoke verify_checkpoint to trigger actions in Vigentic MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why verify_checkpoint needs a policy

While the tool starts with validation (a Read-like operation), it explicitly runs 'ordered verification commands', which constitutes executing external operations. The execution of arbitrary verification commands could have side effects depending on what those commands do, placing this in the Execute category.

From the tool's definition 'run ordered verification commands' — the tool executes commands as part of its verification process

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

verify_checkpoint Rate-limited

verify_checkpoint stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "verify_checkpoint": {
      "limits": [
        {
          "counter": "verify_checkpoint_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Vigentic MCP, so you can run agents against it safely.

FAQ

Questions about verify_checkpoint

What does the verify_checkpoint tool do? +

Validate a checkpoint against disk state, then run ordered verification commands only if the checkpoint is still current. It is categorised as a Execute tool in the Vigentic MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on verify_checkpoint? +

Register the Vigentic MCP server in PolicyLayer and add a rule for verify_checkpoint: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Vigentic MCP. Nothing to install.

What risk level is verify_checkpoint? +

verify_checkpoint is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit verify_checkpoint? +

Yes. Add a rate_limit block to the verify_checkpoint rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block verify_checkpoint completely? +

Set action: deny in the PolicyLayer policy for verify_checkpoint. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides verify_checkpoint? +

verify_checkpoint is provided by the Vigentic MCP server (munozu/vigentic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.